Finisher for asphalt surfaces and method for producing asphalt surfaces by means of said finisher

Abstract

The invention relates to a finisher for asphalt surfaces (1) having a body (3) which can be moved by tracks or wheels (2), said body having a mixed-product bucket (4) for receiving a supply of an asphalt mixture (5), a conveying device (6) for conveying the asphalt mixture (5), an application device for applying the asphalt mixture (5) from the conveying device (6) onto a substrate (10) as an asphalt surface (1) and a compaction device (11) for compacting the applied asphalt surface (1). The invention further relates to a method for producing asphalt surfaces. The disadvantage of known finishers for asphalt surfaces is that the concentration of rising harmful substances is too high. The invention improves this by way of a combination of a curtain of water mist and a suction device.

Description

PAVER FOR ASPHALT PAVING AND METHOD FOR PRODUCING ASPHALT PAVING USING THIS PAVER

[0001] The invention relates to a paver for asphalt pavements according to the preamble of claim 1 and to a method for producing such asphalt pavements according to the preamble of claim 13.

[0002] In particular, the invention relates to a paver and a method for producing road surfaces in the form of bituminous blacktops. The paver comprises a body movable via tracks or wheels, with a mix hopper for holding a supply of asphalt mixture, a conveyor device for conveying the asphalt mixture, an application device for applying the asphalt mixture received from the conveyor device as an asphalt surface to a subgrade, and a compaction device for pre-compacting or compacting the asphalt surface applied to the subgrade.

[0003] Pavers used to apply road surfaces usually have a driver's cab in which at least one person is located to drive and operate the functions. Furthermore, other members of the construction crew usually stand to the right and left of the paver as so-called plank walkers. They monitor the filling of the mix hopper and also control and monitor the application device and the application of the asphalt layer. To produce low-noise asphalt, but also to increase lateral stability, additional substances are often added to the asphalt mixture of bitumen and mineral. These can be polymers to increase the absorption of lateral forces, blowing agents for producing foamed asphalt, or other additives.

[0004] Particularly during hot processing at temperatures above 150 °C, and especially during the processing of so-called distillate and air-rectified bitumen, vapors and aerosols are generated that are suspected of being carcinogenic. The maximum permissible workplace concentration (MAK) for the hot processing of distillate bitumen has therefore been set by the MAK Commission at 1.5 mg / m³.

[0005] To reduce emissions, one approach is to reduce evaporation rates by lowering the processing temperature. For this purpose, so-called low-temperature (LT) asphalts, also known as low-temperature asphalt (NTA), are used, or viscosity-reducing components are added, which can lower the processing temperature by 20 to 30 °C. Typical delivery temperatures for the asphalt mix, for example, are between 140 °C and 160 °C. Furthermore, extraction systems have already been used in France to extract the vapors, resulting in a 35% reduction in exposure to vapors and aerosols from bitumen at the paver (see DGVU German Statutory Accident Insurance Association – DGVU forum magazine 4 / 2020).

[0006] The use of foamed bitumen also allows the delivery and processing temperature of the asphalt mix to be significantly reduced. While with conventional asphalt mixes this temperature can reach up to 170°C, foamed bitumen can be processed at approximately 140°C. Measurements have shown that the maximum allowable concentration (MAK) values ​​for air pollution depend not only on the weather, particularly the wind, but also on the position of the person relative to the paver and the temperature of the asphalt. For example, the driver is often exposed to the highest concentration of 7-8 mg / m³, while in the area of ​​the screed walkers the concentration can be 4 mg / m³ or even higher. While the use of the above-mentioned materials, which are processed at lower temperatures, can reduce pollutant levels, their use is not always possible, and while it leads to an improvement, it is not optimal.

[0007] In principle, it is of course desirable to better protect members of the construction crew and nearby passers-by from health risks caused by rising vapors and aerosols.

[0008] A generic paver that offers improved protection for personnel is known from EP 3 276 081 A1. This paver comprises a screed assembly for laying a sheet of asphalt material, a tank for storing a coolant, and a nebulizing device designed to receive coolant from the tank and nebulize the coolant into a coolant mist in the area surrounding the paver. By cooling the environment, the amount of harmful exhaust gases released by hot road construction material can be reduced. In this paver, the coolant mist extends from the screed assembly upwards to a height of approximately 0.7 m, in particular approximately 1.0 m, in particular approximately 1.50 m, and can also be sprayed next to the paver.

[0009] While the paver mentioned above does reduce the amount of harmful gases, the effectiveness of this pollutant reduction could be optimized. Furthermore, the coolant mist rises alongside the paver, meaning accompanying personnel may be exposed to the mist.

[0010] Other pavers for asphalt pavements are known from DE10 2011 001 542 B4 or DE10 2010 029 705 A1. These pavers are typically filled with the asphalt mix produced in an asphalt mixing plant via trucks with tipping troughs. The asphalt mix is ​​continuously fed via the conveyor to the application device, which applies a flat layer of asphalt to the subgrade. A compaction device on the paver initially precompacts this fresh layer before it is finally compacted, not necessarily, but usually, by external compactors in the form of roller vehicles.

[0011] A road construction machine with at least one screed assembly and a ventilation system with a fan is known from EP 2 672 008 A1. This includes a machine control system that automatically, independently of the operator, and exclusively based on demand determines the need for operation of a ventilation system and starts the ventilation system automatically and independently of the operator during operation.

[0012] Another paver is known from EP 1 925 736 A1. This paver has a spray system on the vehicle with at least two spray devices arranged laterally offset from one another in relation to the direction of travel, and a control device that operates the spray devices according to a method such that, during the vehicle's travel, a spray carpet is created with front and rear boundaries in the direction of travel.

[0013] A flue gas cleaning system for an asphalt paving machine for reducing harmful fumes released during the paving of asphalt in the mix hopper of a paver is known from US Pat. No. 5,938,371. This flue gas cleaning system utilizes the existing sheet metal walls of the mix hopper and the superstructure and a high-performance fan that expels the exhaust gases via a high exhaust stack well above the machine operators.

[0014] However, all of these systems have the disadvantage that exhaust gases escaping from the sides and under the paver are optimally kept away from the operators.

[0015] The invention improves the known cleaners in that, on the one hand, the body (3) has at least one liquid tank (9) and at least on one side, the front, the back or a long side, a spray device (7) and pumping means for at least partially dispensing a liquid along the side in the direction of the ground (10) via at least one dispensing nozzle (8) and, on the other hand, the mist and the pollutants are sucked away via a suction device.

[0016] The object of the invention is therefore to create a paver for asphalt pavements in which the concentration of toxic gases in the working area of ​​the operating personnel is reduced. Furthermore, a further object of the invention is to create a method for producing asphalt pavements with reduced pollutant load for the columns carrying out the process.

[0017] These objects are achieved according to the invention with regard to the finisher by a finisher according to claim 1 and with regard to the method by a method according to claim 15.

[0018] The new paver is characterized in particular by the fact that the body has access to a liquid supply, in particular by having at least one liquid tank, and at least on one side, the front, the rear, or a longitudinal side, a spray device and pumping means for at least partially dispensing a liquid along the side toward the subsurface via at least one dispensing nozzle or a row of nozzles. The new method for producing the asphalt pavement is characterized in that the surrounding soil or the edge of the asphalt layer is cooled by sprinkling with water mist, water droplets, and / or a falling curtain of water jets, or vapors and aerosols are removed by condensation and flushing of the rising air with the water.

[0019] A basic idea of ​​the invention is that cooling water can both quickly cool the freshly applied asphalt layer to prevent further vapors and aerosols from rising, and also remove airborne pollutants from the ambient air through condensation and flushing. In addition, the invention utilizes an extraction system to reduce exposure at the operator's workplace.

[0020] For this purpose, according to the invention, at least one spraying device and a liquid supply, preferably formed by a tank for the cleaning liquid and a pumping device, are provided on the paver. The spraying device generates the water mist, a curtain of water droplets, or water jets. The amount of liquid can vary depending on the application and the required cooling capacity, or depending on the air contamination. Preferably, the known paver is further developed such that a sprinkling occurs, essentially along an elongated line or area, at least at the locations where the new layer of hot asphalt has been applied.

[0021] In a preferred embodiment, the spraying device is designed such that, via an appropriate nozzle geometry, it allows moisture to fall, either in the form of a mist, droplets, or as a liquid jet, in such a way that a strip of a certain width transverse to the direction of travel and working, as well as of the required length, is misted or sprinkled. This strip can be, for example, 10 cm, 20 cm, or even 50 cm wide.

[0022] By applying a water mist as part of a fogging technique, the outdoor area at 40°C can be reduced by approximately 10°C due to the evaporation temperature, regardless of the water temperature. Since the surface temperature and the temperature of the convectively rising air just above the asphalt layer are significantly higher, in particular significantly higher than 100°C, the area can be cooled by up to 12–13°C. This can be done in addition to or as an alternative to the measures described above. A proven distance between the spray nozzles of the spraying device, for example, is between 200–250 mm.

[0023] Depending on the application, the spray direction of the spray device is directed either toward the edge of the hot asphalt layer or, if the primary purpose is air purification and the cooling effect is not required, adjacent to this layer. Furthermore, the spray device can also be positioned underneath the body, allowing not only the edges of the hot asphalt layer to be cooled, but also the central area. Of course, all other methods for cooling a warm surface can also be applied here.

[0024] In a preferred embodiment of the paver according to the invention, each longitudinal side is sprinkled or sprayed with a moisture curtain as described above, either only along the layer of hot asphalt, as long as it is still within the paver's area, or along the entire side length of the paver. Many pavers have a body that is narrower than the application device, which can be located, for example, near the mix hopper, between the mix hopper and the driver. This means that the driver is directly above the freshly laid asphalt layer, which explains the aforementioned high MAK values ​​compared to a screed walker. Here, the spraying device can cover this narrow area of ​​the body, so that the spraying device moves laterally along the applied layer with the body. A lateral orientation of the spraying direction can cover the area projecting laterally to protect the screed walker.

[0025] The rear area, perpendicular to the direction of travel and work, can also be sprayed in the same way using a spray device. This has a direct cooling effect across the entire width of the hot asphalt layer. To prevent vapors and aerosols from escaping due to the convective flow on the opposite side, a spray device can also be installed here.

[0026] In the context of the above-mentioned spray devices, this can of course be a single spray device with correspondingly elongated outlet channels / nozzles, or one or more separate spray devices on each side. Multiple tanks and multiple pumping devices can also be provided. Ultimately, the implementation of the invention depends on providing the curtain of atomized water, water droplets, or water jets in the necessary areas.

[0027] Ultimately, the number and arrangement of the spray device(s), the number of spray nozzles used, their water flow rate, and the angle of the spray jet will depend on the paver's design and, where applicable, the material being processed. It is important to create a cooling effect for the surface of the applied asphalt layer and / or in the rising vapor in such a way that pollutants are reduced either by reducing vapor emissions or by condensing and flushing the vapor where air flows into the breathing zone of the construction crew members. Therefore, the area of ​​the driver and the plank walkers should be protected by the resulting cooling effects, with particular consideration given to the flow paths of the rising vapors.

[0028] The effect of the invention can be enhanced by additionally providing planking on the paver. For this purpose, flow-directing plates can be provided as vapor and aerosol barriers to protect against lateral vapor discharge. The plates preferably hang from the sides or the front or rear of the paver or are fixed in front of the lower areas of these surfaces. A similar solution is known as track cover and bullet protection for armored personnel carriers. In this case, the spray device is preferably arranged directly behind these plates, so that the outflowing gases and aerosols collect at these edge areas behind the plates and are directly sprayed by the spray device.

[0029] Furthermore, water running down the panels can form a dense curtain on the underside of the panels, similar to what happens in paint shop spray booths, preventing vapors and aerosols from escaping beneath the panels. Finally, the panels can also have gutters on their underside, similar to rain gutters, to collect the runoff water. From these gutters, the runoff water can be conveyed either by drainage or by pumping into a dirty fluid reservoir for cleaning and recycling. Multiple use of the water is also possible; in this case, the runoff and collected water is returned to the paver's fluid tank.

[0030] At the front of the paver, the plates are preferably designed to be elastic at least in sections, so that the plates can be folded backwards in the direction of travel and work, so that their lower edge scrapes over the subsurface that has not yet been coated with a layer of asphalt. At the rear of the paver, the plates are preferably also designed to be elastic, so that they scrape over the fresh asphalt surface to form a seal. A small gap can be left at the sides, although elastic means can of course also be provided here, which scrape along the side of the subsurface. These can be chains, fabrics or similar materials, which then also form a seal on the sides.

[0031] Additionally, extraction devices can be provided on both sides of the panels, just one side, or if no panels are provided as vapor and aerosol barriers, even independently of these panels, to additionally extract vapors and aerosols. These extraction devices preferably expel the vapors and aerosols through an exhaust-like outlet device, which can include a cleaning device for filtering out vapors and aerosols. The outlet device is preferably positioned high enough so that escaping gases exit outside the intake area for the breathing air of the members of the construction crew.

[0032] Finally, the paver can also be equipped with a control or regulation system that can automatically monitor the function of the pumping device for generating the liquid mist or curtain, or even the cleaning effect. For this purpose, a level monitor for the liquid tank can be provided, for example. If the liquid in the liquid tank runs low, a signal can be triggered or even the paver's operation can be automatically stopped.

[0033] Finally, a device for monitoring the pollutant content of the ambient air can also be provided. This device can measure air contamination with pollutant-laden vapors or aerosols and also either issue a warning signal or, in this case, prevent the paver from operating, if necessary after a certain tolerance period.

[0034] To obtain the air sample, either extraction devices such as those described above can be used, or separate intake devices are provided, which can be used, in particular, to draw in air outside the intake area or the coverage area of ​​the spraying device. This draws in the air that could potentially be inhaled as breathing air by members of the construction crew, especially the paver driver and the plank walkers. Using air quality measuring devices, to which the extracted samples are continuously or discretely added, a value significant for pollutant levels can then be monitored.

[0035] To monitor pollutant levels, it is not necessary to determine the actual toxic substance content in the vapors; it is usually sufficient to compare a corresponding value, such as the CO or CO2 content, with the ambient value to determine the extent to which air influenced by the work process is reaching the vicinity of the operating personnel. Of course, direct measurement of pollutants or other gas components in the rising vapor is also possible, as is measuring the aerosol content.

[0036] In a further embodiment of the paver according to the invention, it is advantageous if the mix hopper has an upper, chimney-like cover. This can be in the shape of a chimney. The cover can be opened to fill the mix hopper, for example by folding it up or sliding it. After the mix hopper has been filled, the cover is then sealed and moved into a use position, for example by folding it down or sliding it. This allows vapors rising from the mix to escape through a chimney in the cover, the outlet opening of which is at least 1.5 m, preferably 1.8 m, and particularly preferably more than 2 m above the applied asphalt pavement. Instead of the chimney, an additional extraction system or the extraction device can of course be used to extract vapors from the interior of the cover and the mix hopper.

[0037] Furthermore, the underbody of the paver, with the exception of the intake openings, can be sealed off from the area occupied by the operating personnel who are normally on the paver. This deflects rising vapors, for example, away from the driver's cab, which was previously largely open at the bottom, thus providing additional protection for the driver.

[0038] Further features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings.

[0039] In the drawings shows: Fig.1

[0040] A paver according to the invention in a side view. Fig.2

[0041] The rear part of a paver according to the invention in an enlarged view. Fig.3

[0042] A first, additional modification of the paver according to Figure 1 or 2 in a partial detailed view. Fig.4

[0043] A second, additional modification of the paver according to Figures 1 to 3 in a partial detailed view.

[0044] Figure 1 depicts a paver having a body 3, which travels in a travel and working direction F during lay-out operation and has an operating and control station for a driver and operator. A mix hopper 4 is provided in the front area, into which asphalt mix 5 is poured as a reserve via the tipping trough of a truck. From this reserve of asphalt mix 5, hot asphalt is deposited via a conveyor device 6, here in the form of an extrusion screw, via a wide-slot die to form an asphalt pavement 1 onto the subgrade 10.

[0045] At the rear of the paver, a compaction device 11 in the form of pressure plates is provided, which performs a preliminary compaction of the asphalt pavement 1. The final compaction is then achieved by roller vehicles. The paver shown here is moved via wheels 2, for example; alternatively, the known chain drives are also possible. In this respect, the paver shown does not differ from the devices known from the prior art.

[0046] The paver is equipped with at least one spray device 7 with at least one dispensing nozzle 8, but preferably with a plurality of spray devices 7, each with a plurality of dispensing nozzles 8 and a liquid supply, which can be formed by a liquid tank 9 and pumping means. The liquid can in principle be provided by an accompanying vehicle, including a towed or pushed trailer, via a hose line or via a liquid tank 9 arranged on the body 3, as shown here. Liquid is supplied to the spray device 7 under pressure via pumping means, with corresponding dispensing nozzles 8 ensuring that the spray device 7 emits a curtain of finely atomized water, drops or even water jets, or a combination thereof, directed downwards towards the subsurface 10 and the laid asphalt.

[0047] In the example shown, an elongated spray device 7 with outlet nozzles arranged one behind the other extends on each side of the body 3, wherein the spray device 7 extends on the sides from front to rear in order to be able to cool or flush away vapors that are distributed over the substructure 10 of the slowly moving paver. This is particularly important for the driver, but also for the plank walkers walking in the front area. In a preferred embodiment, the mix hopper 4 can either be closable with a lid or, as is known from the chimney of a chimney, a passive or active vapor extraction system can be provided above the hot asphalt mixture 5 in order to protect the personnel from vapors that rise from the mix hopper 4.

[0048] The spray devices 7 can also be located on the underside of the body 3, parallel to the direction of travel, perpendicular to the direction of travel, at the front, the rear of the paver, or even in between. Combinations are also possible. With the exception of the intake openings, the underbody of the paver is sealed off from the area where the operating personnel are normally located on the paver by a floor cover.

[0049] Figure 2 shows an enlarged detailed view of the front area of ​​the paver with the spray device 7 according to the prior art. It can be seen that the spray device 7 essentially consists of a pressure line running parallel to the body 3 and individual outlet nozzles through which the pressurized liquid in the pressure line can be discharged downwards in the desired width and fineness. Such a pressure line can extend all the way around the body 3; alternatively, separate pressure lines, i.e., independent spray devices 7, are also possible.

[0050] Figure 3 shows a slightly different design of the spray device 7 of a paver, as shown in Figure 1. Here, too, a curtain of finely dispersed liquid, water jets, or liquid droplets is generated via the spray device 7 in the manner described above. However, the spray device 7 also has an additional suction device 12 that also functions as an extraction device, allowing rising vapors to be extracted. This is done via vents on the underside of the multifunctional pressure line. Air can also be drawn in from the sides.

[0051] The intake air is preferably expelled either via an exhaust system in an area far away from the operating personnel, so that there is no longer any risk of inhaling this air with its original pollutant concentration. Alternatively, purification can of course also be provided, for example, by means of activated carbon filters or passing the air through a water bath, particularly to filter out aerosols and water-soluble pollutants from the intake air.

[0052] Figure 4, in turn, shows a design that features lateral plates 13 as a vapor and aerosol barrier 14. These lateral plates 13 serve to prevent a significant portion of vapor or aerosols from escaping laterally from the vehicle area and entering the area occupied by the plank walkers. In addition to directly directing the flow, the plates 13 also enable targeted spraying of the rising vapors and aerosols via the spray device 7.

[0053] The plates 13 can extend along the sides, across the entire length of the sides, or only partially, as well as across the front and rear of the paver's body 3. They can preferably extend to the surface of the subgrade 10 or, if their lower edge extends onto the layer of hot asphalt, to its surface while leaving a certain gap. If the plates 13 are elastic or have elastic lower edges, for example in the form of hanging fabric, hanging foils or chains, or similar flow barriers, they can also be moved in a dragging motion across the subgrade 10.

[0054] Furthermore, the plates 13 can be provided on the front and rear of the body 3. Here too, as shown in Figure 4, the plates 13 can have a rigid, for example, obliquely protruding upper section, to which an articulated lower section extends over the base 10. This can be rigid, as shown here, and possibly also have rollers so that it can slide or roll on the base 10. Alternatively, elastic plates 13 or a lower elastic, lower edge region of a rigid plate 13 can be provided here. The same applies to the front region of the body 3.

[0055] The plates 13 of the vapor and aerosol barrier 14 have the further advantage that, in the case of intended vapor extraction, this extraction can be carried out more effectively with a lower negative pressure, since the extraction device 12 only needs to generate a lower negative pressure below the body 3 to effectively extract vapors and aerosols compared to a free lateral discharge of the vapors. For this reason, this design of the paver is also possible without a spray device 7 and represents a sensible alternative.

[0056] If a spray device 7 is provided, the liquid dispensed by this spray device 7 can at least partly be collected via a lower gutter system (not shown here) and recycled, if necessary with purification of the liquid.

[0057] Asphalt surfaceWheelBodyMix bucketAsphalt mixtureConveyor deviceSpray deviceDispensing nozzleLiquid tankSubsurfaceCompaction deviceSuction devicePlateVapor and aerosol brakeGround coverF Driving and working direction Patent literature

[0058] EP 3 276 081 A1

[0059] DE10 2011 001 542 B4

[0060] DE10 2010 029 705 A1

[0061] EP 2 672 008 A1

[0062] EP 1 925 736 A1

[0063] US 5 938 371 A Non-patent literature

[0064] DGVU German Association of Statutory Accident Insurance – Magazine DGVU Forum 4 / 2020

Claims

Paver for asphalt paving (1), in particular for producing road surfaces in the form of bituminous blacktops, with a body (3) which can be moved via chains or wheels (2), which has a mixing bucket (4) for receiving a supply of an asphalt mixture (5) consisting of a bituminous component and a mineral filler, a conveyor device (6) for conveying the asphalt mixture (5), an application device for applying the asphalt mixture (5) received from the conveyor device (6) as an asphalt paving (1) to a subsurface (10), and a compaction device (11) for compacting the asphalt paving (1) applied to the subsurface (10), wherein the body (3) has a liquid supply and at least on one side, the front, the back or a longitudinal side,and / or on the underside of the body (3) has a spray device (7) for at least partially dispensing a liquid along the side in the direction of the substrate (10) via at least one dispensing nozzle (8), characterized in that the body (3) has a suction device (12) for vapors and aerosols rising from the asphalt mixture (5) and / or the asphalt surface (1), and the suction device (12) comprises suction openings which extend along the long sides, the rear and the front of the body (3) or are distributed over these sides. Paver for asphalt pavements according to claim 1, characterized in that the suction device (12) has a filter device and an outlet for filtered vapor components, in particular directed vertically upwards and arranged above a driver's cab. Paver for asphalt paving according to one of the two preceding claims, characterized in that the body (3) has a vapor and aerosol barrier (14) running around the body (3) for retaining vapors and aerosols that rise from the asphalt paving (1) and escape at the underside of the body (3), wherein the vapor and aerosol barrier (14) is formed by circumferential curtains or plates (13) hanging down from the long sides, the back and the front of the body (3). Paver for asphalt paving according to the preceding claim, characterized in that the suction device (12) is arranged within the circumferential vapor and aerosol barrier (14). Paver for asphalt pavements (1) according to one of the two preceding claims, characterized in that at least the body (3) for supplying the spray device (7) has at least one liquid tank (9) and pumping means for pumping the liquid from the liquid tank (9) to the spray device (7). Paver for asphalt pavements (1) according to one of the preceding claims, characterized in that the spraying device (7) is designed such that the spraying device (7) is able to emit a mist of finely distributed liquid, in particular of atomized water, a curtain of liquid drops and / or liquid jets along at least part of the side. Paver for asphalt pavements (1) according to one of the preceding claims, characterized in that the body (3) has dispensing nozzles (8) on two opposite longitudinal sides and the rear side for dispensing liquid in the direction of the subsurface (10), wherein the dispensing nozzles (8) are distributed on the longitudinal sides at least over the area of ​​the asphalt pavement (1) laid out by the application device. Paver for asphalt paving (1) according to the preceding claim, characterized in that the dispensing nozzles (8) are distributed or extend on the longitudinal sides over the entire length of the longitudinal sides. Paver for asphalt paving (1) according to one of the two preceding claims, characterized in that the body (3) has discharge nozzles (8) on the front side for discharging liquid in the direction of the subsurface (10). Paver for asphalt paving (1) according to one of the preceding claims, characterized in that the dispensing nozzles (8) are part of a common spraying device (7). Paver for asphalt paving (1) according to one of claims 1 to 9, characterized in that the body (3) has on each side, the front and the rear, a spray device (7) with dispensing nozzles (8) for generating a liquid veil on the respective side. Paver for asphalt pavements according to claim 5 or one of claims 6 to 11 in conjunction with a paver which has a liquid tank (9), characterized in that it has a control which is able to monitor the fill level of the liquid tank (9) and / or the contamination of the ambient air and which, if the fill level drops or a predetermined limit value of the maximum workplace concentration (MAK value) is exceeded, in particular at MAK values ​​above 1.5 mg pollutant / m³ air, triggers a signal and / or stops the operation of the paver. Paver for asphalt pavements (1) according to one of the preceding claims, characterized in that the mix bucket (4) has an upper, chimney-like cover, wherein the cover can be opened and, after filling the mix bucket (4), the mix bucket (4) can be moved into a use position in a sealing manner, and vapors rising from the mix escape through a chimney, the outlet opening of which is at least 1.5 m, preferably 1.8 m and particularly preferably more than 2 m above the applied asphalt pavement (1), or are sucked away by an additional suction device or the suction device (12). Paver for asphalt paving (1) according to one of the preceding claims, characterized in that the underbody of the paver, with the exception of the intake openings, is sealed off from the area where the operating personnel are supposed to be on the paver by means of a floor cover (15). A method for producing asphalt pavements using a paver according to one of the preceding claims, comprising the following method steps: continuously applying a layer of a heated asphalt mixture (5) to a subsurface (10) using the paver, compacting the applied layer via the paver and / or by means of following rollers, allowing the asphalt pavement (1) applied to the subsurface (10) to cool, wherein, in the direction of travel and working (F) of the paver, during the application of the layer of the heated asphalt mixture (5), at least along the rear longitudinal sides of the paver, a mist of finely distributed liquid, in particular atomized water, a curtain of liquid drops and / or liquid jets is discharged in the direction of the subsurface (10) on both sides next to the paver via at least one spray device (7) in order to bind vapors and aerosols rising from the layer and / or to cool the layer, characterized in that the side surfaces,the rear and / or the front of the paver are provided with gas-retaining plates (13), wherein the spraying device (7) is designed and controlled in such a way that the mist of finely distributed liquid, the curtain of liquid droplets and / or the liquid jets, as seen from the paver, are sprayed on the inside of the plates (13) to form a vapor and aerosol barrier (14) in the direction of the substrate (10). Method for producing asphalt pavements by means of a paver according to the preceding claim, characterized in that a mixture containing a low-temperature bitumen (LT bitumen), in particular shredded or ground bitumen components with a proportion of more than 50%, additives in the form of wax and / or plastic and a release agent is used as the bitumen-containing component of the asphalt mixture (5). Method for producing asphalt pavements by means of a paver according to one of the two preceding claims, characterized in that in the direction of travel and working (F) of the paver during the application of the layer of the heated asphalt mixture (5) on the rear and / or the front of the paver via a spray device (7) a mist of finely distributed liquid, in particular of atomized water, a curtain of liquid drops and / or liquid jets is discharged in the direction of the subsoil (10) on both sides next to the paver. Method for producing asphalt pavements by means of a paver according to one of claims 15 to 17, characterized in that vapors and / or aerosols are extracted next to and below the paver via a suction device (12) and are either first fed to a filter device and then discharged or are discharged directly into the environment, wherein the discharge of the vapors and / or aerosols is designed in such a way that people carrying out the method are not located in the exhaust gas jet of the discharge when carried out as intended. Method for producing asphalt pavements by means of a paver according to the preceding claim, characterized in that the discharge line comprises a gas or aerosol outlet which is located more than 2 m above the subsurface (10), in particular higher than 3 m above the subsurface (10).

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